<div 
  class="container" 
  [ngStyle]="{
    'grid-template-rows': templateRows,
    'grid-template-columns': templateColumns
  }"
  (scroll)="handleScroll($event)"
>
  <ng-content select="[appGridItem]"></ng-content>
</div>
<div class="underline" *ngIf="scrollable">
  <div class="highlight" [ngStyle]="{'margin': sliderMargin}"></div>
</div>
